Contour plots of the particle intensity at r = 1.5 AU, drawn on top of different MHD solar wind variables, 15.5 h after particle injection and for the simulations with cross-field diffusion. The red parallels indicate the borders of the sampling region. Four cases with different injection regions are shown. Upper left: intensities of case 1 drawn on top of the magnetic field magnitude. Upper right panel: intensities of case 2 drawn on top of the magnetic field colatitude component. Lower left panel: intensities of case 3 drawn on top of the magnetic field magnitude. Lower right panel: intensities of case 4 drawn on top of the longitudinal velocity component. (Wijsen et al., 2019b).